gcc/config/i386/x86-64.h

   1 /* OS independent definitions for AMD x86-64.
   2    Copyright (C) 2001-2017 Free Software Foundation, Inc.
   3    Contributed by Bo Thorsen <bo@suse.de>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #undef ASM_COMMENT_START
  27 #define ASM_COMMENT_START "#"
  28
  29 #undef DBX_REGISTER_NUMBER
  30 #define DBX_REGISTER_NUMBER(n) \
  31   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  32
  33 /* Output assembler code to FILE to call the profiler.  */
  34 #define NO_PROFILE_COUNTERS 1
  35
  36 #undef MCOUNT_NAME
  37 #define MCOUNT_NAME "mcount"
  38
  39 #undef SIZE_TYPE
  40 #define SIZE_TYPE (TARGET_LP64 ? "long unsigned int" : "unsigned int")
  41
  42 #undef PTRDIFF_TYPE
  43 #define PTRDIFF_TYPE (TARGET_LP64 ? "long int" : "int")
  44
  45 #undef WCHAR_TYPE
  46 #define WCHAR_TYPE "int"
  47
  48 #undef WCHAR_TYPE_SIZE
  49 #define WCHAR_TYPE_SIZE 32
  50
  51 #undef ASM_SPEC
  52 #define ASM_SPEC "%{m16|m32:--32} %{m64:--64} %{mx32:--x32}"
  53
  54 #undef ASM_OUTPUT_ALIGNED_BSS
  55 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  56   x86_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  57
  58 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
  59 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)           \
  60   x86_elf_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN);
  61
  62 /* This is used to align code labels according to Intel recommendations.  */
  63
  64 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  65 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  66   do {                                                                  \
  67     if ((LOG) != 0) {                                                   \
  68       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  69       else {                                                            \
  70         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  71         /* Make sure that we have at least 8 byte alignment if > 8 byte \
  72            alignment is preferred.  */                                  \
  73         if ((LOG) > 3                                                   \
  74             && (1 << (LOG)) > ((MAX_SKIP) + 1)                          \
  75             && (MAX_SKIP) >= 7)                                         \
  76           fputs ("\t.p2align 3\n", (FILE));                             \
  77       }                                                                 \
  78     }                                                                   \
  79   } while (0)
  80 #undef  ASM_OUTPUT_MAX_SKIP_PAD
  81 #define ASM_OUTPUT_MAX_SKIP_PAD(FILE, LOG, MAX_SKIP)                    \
  82   if ((LOG) != 0)                                                       \
  83     {                                                                   \
  84       if ((MAX_SKIP) == 0)                                              \
  85         fprintf ((FILE), "\t.p2align %d\n", (LOG));                     \
  86       else                                                              \
  87         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  88     }
  89 #endif
  90
  91
  92 /* i386 System V Release 4 uses DWARF debugging info.
  93    x86-64 ABI specifies DWARF2.  */
  94
  95 #define DWARF2_DEBUGGING_INFO 1
  96 #define DWARF2_UNWIND_INFO 1
  97
  98 #undef PREFERRED_DEBUGGING_TYPE
  99 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 100
 101 #undef TARGET_ASM_SELECT_SECTION
 102 #define TARGET_ASM_SELECT_SECTION  x86_64_elf_select_section
 103
 104 #undef TARGET_ASM_UNIQUE_SECTION
 105 #define TARGET_ASM_UNIQUE_SECTION  x86_64_elf_unique_section
 106
 107 #undef TARGET_SECTION_TYPE_FLAGS
 108 #define TARGET_SECTION_TYPE_FLAGS  x86_64_elf_section_type_flags